error box when trying to Open URL over ssh

bzr: ERROR: exceptions.AssertionError: _remember_remote_is_before((2, 1)) called, but _remember_remote_is_before((1, 6)) was called previously.

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\explorer\lib\explorer.py", line 1405, in callable_with_cleanup
  File "C:/Program Files/Bazaar/plugins\explorer\lib\explorer.py", line 1566, in _open_location_task
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location.py", line 152, in __init__
  File "C:/Program Files/Bazaar/plugins\explorer\lib\location.py", line 214, in reopen_location
  File "bzrlib\bzrdir.pyo", line 989, in open_containing_tree_branch_or_repository
  File "bzrlib\bzrdir.pyo", line 898, in open_containing
  File "bzrlib\bzrdir.pyo", line 919, in open_containing_from_transport
  File "bzrlib\bzrdir.pyo", line 878, in open_from_transport
  File "bzrlib\bzrdir.pyo", line 2088, in open
  File "bzrlib\bzrdir.pyo", line 3327, in _open
  File "bzrlib\remote.pyo", line 115, in __init__
  File "bzrlib\remote.pyo", line 130, in _probe_bzrdir
  File "bzrlib\smart\medium.pyo", line 615, in _remember_remote_is_before
AssertionError: _remember_remote_is_before((2, 1)) called, but _remember_remote_is_before((1, 6)) was called previously.

bzr 2.1.1 on python 2.5.4 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.exe', 'explorer']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.1.0]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.0.1]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.1.1]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.1.1]
  news_merge C:\Program Files\Bazaar\plugins\news_merge [2.1.1]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.18.4]
  rebase C:\Program Files\Bazaar\plugins\rebase [0.5.5]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.2]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.7.dev]

######################

Console content :

QFileSystemWatcher: failed to add paths: C:/Users/Foaly/AppData/Roaming/bazaar/2.0/bazaar.conf
Connected (version 2.0, client OpenSSH_5.1p1)
Adding ssh-rsa host key for xxx.xxx.xxx.xxx: xxx
Authentication (password) successful!
Secsh channel 1 opened.
Server does not understand Bazaar network protocol 3, reconnecting. (Upgrade the server to avoid this.)
Connected (version 2.0, client OpenSSH_5.1p1)
Authentication (password) successful!
Secsh channel 1 opened.

I think it's due to a config problem (I'm just looking quickly bazaar for first time), but error seems to be not handled